Co-combustion of bituminous coal with low volatile semi-coke is an effective method

which can improve the ignition and burnout performance of semi-coke. This paper describes the combustion characteristics differences

interaction effect

kinetic analysis of semi-coke and anthracite blended with bituminous coal by applying thermogravimetric analyzer. The results indicate that the combustion process of semi-coke is divided into two stages:combustion of combustible materials

and decomposition of calcium carbonate in the semi-coke. The main mass loss peak of the blend fuels close to DTG peak of the single fuel

which has an approximate fuel ratio with the blend. The blend of semi-coke with bituminous coal has better ignition and comprehensive combustion characteristics than blend of anthracite with bituminous coal. Addition of bituminous coal can lower the apparent activation energy

and improve the ignition and burnout performance of semi-coke or anthracite. Moreover

the apparent activation energy decreased

while the ignition and comprehensive combustion characteristics index increased with the blend ratio of bituminous coal. There exist more significant synergetic effects between bituminous coal and semi-coke than between bituminous coal and anthracite. In addition

the ignition index and comprehensive combustion index reveals negative correlation with fuel ratio

while the apparent activation energy shows positive correlation with fuel ratio.